632 lines
16 KiB
Go
632 lines
16 KiB
Go
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package main
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import (
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"embed"
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"github.com/pkg/errors"
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"github.com/veandco/go-sdl2/sdl"
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"github.com/vkngwrapper/core/v2"
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"github.com/vkngwrapper/core/v2/common"
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"github.com/vkngwrapper/core/v2/core1_0"
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"github.com/vkngwrapper/extensions/v2/ext_debug_utils"
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"github.com/vkngwrapper/extensions/v2/khr_portability_enumeration"
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"github.com/vkngwrapper/extensions/v2/khr_portability_subset"
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"github.com/vkngwrapper/extensions/v2/khr_surface"
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"github.com/vkngwrapper/extensions/v2/khr_swapchain"
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vkng_sdl2 "github.com/vkngwrapper/integrations/sdl2/v2"
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"log"
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)
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//go:embed shaders
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var shaders embed.FS
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var validationLayers = []string{"VK_LAYER_KHRONOS_validation"}
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var deviceExtensions = []string{khr_swapchain.ExtensionName}
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const enableValidationLayers = true
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type QueueFamilyIndices struct {
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GraphicsFamily *int
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PresentFamily *int
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}
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func (i *QueueFamilyIndices) IsComplete() bool {
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return i.GraphicsFamily != nil && i.PresentFamily != nil
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}
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type SwapChainSupportDetails struct {
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Capabilities *khr_surface.SurfaceCapabilities
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Formats []khr_surface.SurfaceFormat
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PresentModes []khr_surface.PresentMode
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}
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type HelloTriangleApplication struct {
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window *sdl.Window
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loader core.Loader
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instance core1_0.Instance
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debugMessenger ext_debug_utils.DebugUtilsMessenger
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surface khr_surface.Surface
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physicalDevice core1_0.PhysicalDevice
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device core1_0.Device
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graphicsQueue core1_0.Queue
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presentQueue core1_0.Queue
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swapchainExtension khr_swapchain.Extension
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swapchain khr_swapchain.Swapchain
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swapchainImages []core1_0.Image
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swapchainImageFormat core1_0.Format
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swapchainExtent core1_0.Extent2D
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swapchainImageViews []core1_0.ImageView
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}
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func (app *HelloTriangleApplication) Run() error {
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err := app.initWindow()
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if err != nil {
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return err
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}
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err = app.initVulkan()
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if err != nil {
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return err
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}
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defer app.cleanup()
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return app.mainLoop()
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}
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func (app *HelloTriangleApplication) initWindow() error {
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if err := sdl.Init(sdl.INIT_VIDEO); err != nil {
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return err
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}
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window, err := sdl.CreateWindow("Vulkan", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, 800, 600, sdl.WINDOW_SHOWN|sdl.WINDOW_VULKAN)
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if err != nil {
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return err
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}
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app.window = window
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app.loader, err = core.CreateLoaderFromProcAddr(sdl.VulkanGetVkGetInstanceProcAddr())
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if err != nil {
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return err
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}
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return nil
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}
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func (app *HelloTriangleApplication) initVulkan() error {
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err := app.createInstance()
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if err != nil {
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return err
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}
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err = app.setupDebugMessenger()
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if err != nil {
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return err
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}
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err = app.createSurface()
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if err != nil {
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return err
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}
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err = app.pickPhysicalDevice()
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if err != nil {
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return err
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}
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err = app.createLogicalDevice()
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if err != nil {
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return err
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}
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err = app.createSwapchain()
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if err != nil {
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return err
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}
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return app.createGraphicsPipeline()
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}
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func (app *HelloTriangleApplication) mainLoop() error {
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appLoop:
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for true {
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for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
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switch event.(type) {
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case *sdl.QuitEvent:
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break appLoop
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}
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}
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}
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return nil
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}
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func (app *HelloTriangleApplication) cleanup() {
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for _, imageView := range app.swapchainImageViews {
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imageView.Destroy(nil)
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}
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if app.swapchain != nil {
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app.swapchain.Destroy(nil)
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}
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if app.device != nil {
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app.device.Destroy(nil)
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}
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if app.debugMessenger != nil {
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app.debugMessenger.Destroy(nil)
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}
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if app.surface != nil {
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app.surface.Destroy(nil)
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}
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if app.instance != nil {
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app.instance.Destroy(nil)
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}
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if app.window != nil {
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app.window.Destroy()
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}
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sdl.Quit()
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}
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func (app *HelloTriangleApplication) createInstance() error {
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instanceOptions := core1_0.InstanceCreateInfo{
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ApplicationName: "Hello Triangle",
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ApplicationVersion: common.CreateVersion(1, 0, 0),
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EngineName: "No Engine",
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EngineVersion: common.CreateVersion(1, 0, 0),
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APIVersion: common.Vulkan1_2,
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}
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// Add extensions
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sdlExtensions := app.window.VulkanGetInstanceExtensions()
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extensions, _, err := app.loader.AvailableExtensions()
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if err != nil {
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return err
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}
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for _, ext := range sdlExtensions {
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_, hasExt := extensions[ext]
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if !hasExt {
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return errors.Errorf("createinstance: cannot initialize sdl: missing extension %s", ext)
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}
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instanceOptions.EnabledExtensionNames = append(instanceOptions.EnabledExtensionNames, ext)
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}
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if enableValidationLayers {
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instanceOptions.EnabledExtensionNames = append(instanceOptions.EnabledExtensionNames, ext_debug_utils.ExtensionName)
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}
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_, enumerationSupported := extensions[khr_portability_enumeration.ExtensionName]
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if enumerationSupported {
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instanceOptions.EnabledExtensionNames = append(instanceOptions.EnabledExtensionNames, khr_portability_enumeration.ExtensionName)
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instanceOptions.Flags |= khr_portability_enumeration.InstanceCreateEnumeratePortability
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}
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// Add layers
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layers, _, err := app.loader.AvailableLayers()
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if err != nil {
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return err
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}
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if enableValidationLayers {
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for _, layer := range validationLayers {
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_, hasValidation := layers[layer]
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if !hasValidation {
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return errors.Errorf("createInstance: cannot add validation- layer %s not available- install LunarG Vulkan SDK", layer)
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}
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instanceOptions.EnabledLayerNames = append(instanceOptions.EnabledLayerNames, layer)
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}
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// Add debug messenger
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instanceOptions.Next = app.debugMessengerOptions()
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}
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app.instance, _, err = app.loader.CreateInstance(nil, instanceOptions)
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if err != nil {
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return err
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}
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return nil
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}
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func (app *HelloTriangleApplication) debugMessengerOptions() ext_debug_utils.DebugUtilsMessengerCreateInfo {
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return ext_debug_utils.DebugUtilsMessengerCreateInfo{
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MessageSeverity: ext_debug_utils.SeverityError | ext_debug_utils.SeverityWarning,
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MessageType: ext_debug_utils.TypeGeneral | ext_debug_utils.TypeValidation | ext_debug_utils.TypePerformance,
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UserCallback: app.logDebug,
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}
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}
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func (app *HelloTriangleApplication) setupDebugMessenger() error {
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if !enableValidationLayers {
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return nil
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}
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var err error
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debugLoader := ext_debug_utils.CreateExtensionFromInstance(app.instance)
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app.debugMessenger, _, err = debugLoader.CreateDebugUtilsMessenger(app.instance, nil, app.debugMessengerOptions())
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if err != nil {
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return err
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}
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return nil
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}
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func (app *HelloTriangleApplication) createSurface() error {
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surfaceLoader := khr_surface.CreateExtensionFromInstance(app.instance)
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surface, err := vkng_sdl2.CreateSurface(app.instance, surfaceLoader, app.window)
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if err != nil {
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return err
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}
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app.surface = surface
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return nil
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}
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func (app *HelloTriangleApplication) pickPhysicalDevice() error {
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physicalDevices, _, err := app.instance.EnumeratePhysicalDevices()
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if err != nil {
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return err
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}
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for _, device := range physicalDevices {
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if app.isDeviceSuitable(device) {
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app.physicalDevice = device
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break
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}
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}
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if app.physicalDevice == nil {
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return errors.Errorf("failed to find a suitable GPU!")
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}
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return nil
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}
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func (app *HelloTriangleApplication) createLogicalDevice() error {
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indices, err := app.findQueueFamilies(app.physicalDevice)
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if err != nil {
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return err
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}
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uniqueQueueFamilies := []int{*indices.GraphicsFamily}
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if uniqueQueueFamilies[0] != *indices.PresentFamily {
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uniqueQueueFamilies = append(uniqueQueueFamilies, *indices.PresentFamily)
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}
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var queueFamilyOptions []core1_0.DeviceQueueCreateInfo
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queuePriority := float32(1.0)
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for _, queueFamily := range uniqueQueueFamilies {
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queueFamilyOptions = append(queueFamilyOptions, core1_0.DeviceQueueCreateInfo{
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QueueFamilyIndex: queueFamily,
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QueuePriorities: []float32{queuePriority},
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})
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}
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var extensionNames []string
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extensionNames = append(extensionNames, deviceExtensions...)
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// Makes this example compatible with vulkan portability, necessary to run on mobile & mac
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extensions, _, err := app.physicalDevice.EnumerateDeviceExtensionProperties()
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if err != nil {
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return err
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}
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_, supported := extensions[khr_portability_subset.ExtensionName]
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if supported {
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extensionNames = append(extensionNames, khr_portability_subset.ExtensionName)
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}
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app.device, _, err = app.physicalDevice.CreateDevice(nil, core1_0.DeviceCreateInfo{
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QueueCreateInfos: queueFamilyOptions,
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EnabledFeatures: &core1_0.PhysicalDeviceFeatures{},
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EnabledExtensionNames: extensionNames,
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})
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if err != nil {
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return err
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}
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app.graphicsQueue = app.device.GetQueue(*indices.GraphicsFamily, 0)
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app.presentQueue = app.device.GetQueue(*indices.PresentFamily, 0)
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return nil
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}
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func (app *HelloTriangleApplication) createSwapchain() error {
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app.swapchainExtension = khr_swapchain.CreateExtensionFromDevice(app.device)
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swapchainSupport, err := app.querySwapChainSupport(app.physicalDevice)
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if err != nil {
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return err
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}
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surfaceFormat := app.chooseSwapSurfaceFormat(swapchainSupport.Formats)
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presentMode := app.chooseSwapPresentMode(swapchainSupport.PresentModes)
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extent := app.chooseSwapExtent(swapchainSupport.Capabilities)
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imageCount := swapchainSupport.Capabilities.MinImageCount + 1
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if swapchainSupport.Capabilities.MaxImageCount > 0 && swapchainSupport.Capabilities.MaxImageCount < imageCount {
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imageCount = swapchainSupport.Capabilities.MaxImageCount
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}
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sharingMode := core1_0.SharingModeExclusive
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var queueFamilyIndices []int
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indices, err := app.findQueueFamilies(app.physicalDevice)
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if err != nil {
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return err
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}
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if *indices.GraphicsFamily != *indices.PresentFamily {
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sharingMode = core1_0.SharingModeConcurrent
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queueFamilyIndices = append(queueFamilyIndices, *indices.GraphicsFamily, *indices.PresentFamily)
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}
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swapchain, _, err := app.swapchainExtension.CreateSwapchain(app.device, nil, khr_swapchain.SwapchainCreateInfo{
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Surface: app.surface,
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MinImageCount: imageCount,
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ImageFormat: surfaceFormat.Format,
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ImageColorSpace: surfaceFormat.ColorSpace,
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ImageExtent: extent,
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ImageArrayLayers: 1,
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ImageUsage: core1_0.ImageUsageColorAttachment,
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ImageSharingMode: sharingMode,
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QueueFamilyIndices: queueFamilyIndices,
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PreTransform: swapchainSupport.Capabilities.CurrentTransform,
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CompositeAlpha: khr_surface.CompositeAlphaOpaque,
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PresentMode: presentMode,
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Clipped: true,
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})
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if err != nil {
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return err
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}
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app.swapchainExtent = extent
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app.swapchain = swapchain
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images, _, err := swapchain.SwapchainImages()
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if err != nil {
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return err
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}
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app.swapchainImages = images
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var imageViews []core1_0.ImageView
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for _, image := range images {
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|
|
view, _, err := app.device.CreateImageView(nil, core1_0.ImageViewCreateInfo{
|
||
|
|
ViewType: core1_0.ImageViewType2D,
|
||
|
|
Image: image,
|
||
|
|
Format: surfaceFormat.Format,
|
||
|
|
Components: core1_0.ComponentMapping{
|
||
|
|
R: core1_0.ComponentSwizzleIdentity,
|
||
|
|
G: core1_0.ComponentSwizzleIdentity,
|
||
|
|
B: core1_0.ComponentSwizzleIdentity,
|
||
|
|
A: core1_0.ComponentSwizzleIdentity,
|
||
|
|
},
|
||
|
|
SubresourceRange: core1_0.ImageSubresourceRange{
|
||
|
|
AspectMask: core1_0.ImageAspectColor,
|
||
|
|
BaseMipLevel: 0,
|
||
|
|
LevelCount: 1,
|
||
|
|
BaseArrayLayer: 0,
|
||
|
|
LayerCount: 1,
|
||
|
|
},
|
||
|
|
})
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
imageViews = append(imageViews, view)
|
||
|
|
}
|
||
|
|
app.swapchainImageViews = imageViews
|
||
|
|
app.swapchainImageFormat = surfaceFormat.Format
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func bytesToBytecode(b []byte) []uint32 {
|
||
|
|
byteCode := make([]uint32, len(b)/4)
|
||
|
|
for i := 0; i < len(byteCode); i++ {
|
||
|
|
byteIndex := i * 4
|
||
|
|
byteCode[i] = 0
|
||
|
|
byteCode[i] |= uint32(b[byteIndex])
|
||
|
|
byteCode[i] |= uint32(b[byteIndex+1]) << 8
|
||
|
|
byteCode[i] |= uint32(b[byteIndex+2]) << 16
|
||
|
|
byteCode[i] |= uint32(b[byteIndex+3]) << 24
|
||
|
|
}
|
||
|
|
|
||
|
|
return byteCode
|
||
|
|
}
|
||
|
|
|
||
|
|
func (app *HelloTriangleApplication) createGraphicsPipeline() error {
|
||
|
|
// Load vertex shader
|
||
|
|
vertShaderBytes, err := shaders.ReadFile("shaders/vert.spv")
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
vertShader, _, err := app.device.CreateShaderModule(nil, core1_0.ShaderModuleCreateInfo{
|
||
|
|
Code: bytesToBytecode(vertShaderBytes),
|
||
|
|
})
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
defer vertShader.Destroy(nil)
|
||
|
|
|
||
|
|
// Load fragment shader
|
||
|
|
fragShaderBytes, err := shaders.ReadFile("shaders/frag.spv")
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
fragShader, _, err := app.device.CreateShaderModule(nil, core1_0.ShaderModuleCreateInfo{
|
||
|
|
Code: bytesToBytecode(fragShaderBytes),
|
||
|
|
})
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
defer fragShader.Destroy(nil)
|
||
|
|
|
||
|
|
_ = &core1_0.PipelineShaderStageCreateInfo{
|
||
|
|
Stage: core1_0.StageVertex,
|
||
|
|
Module: vertShader,
|
||
|
|
Name: "main",
|
||
|
|
}
|
||
|
|
|
||
|
|
_ = &core1_0.PipelineShaderStageCreateInfo{
|
||
|
|
Stage: core1_0.StageFragment,
|
||
|
|
Module: fragShader,
|
||
|
|
Name: "main",
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (app *HelloTriangleApplication) chooseSwapSurfaceFormat(availableFormats []khr_surface.SurfaceFormat) khr_surface.SurfaceFormat {
|
||
|
|
for _, format := range availableFormats {
|
||
|
|
if format.Format == core1_0.FormatB8G8R8A8SRGB && format.ColorSpace == khr_surface.ColorSpaceSRGBNonlinear {
|
||
|
|
return format
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return availableFormats[0]
|
||
|
|
}
|
||
|
|
|
||
|
|
func (app *HelloTriangleApplication) chooseSwapPresentMode(availablePresentModes []khr_surface.PresentMode) khr_surface.PresentMode {
|
||
|
|
for _, presentMode := range availablePresentModes {
|
||
|
|
if presentMode == khr_surface.PresentModeMailbox {
|
||
|
|
return presentMode
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return khr_surface.PresentModeFIFO
|
||
|
|
}
|
||
|
|
|
||
|
|
func (app *HelloTriangleApplication) chooseSwapExtent(capabilities *khr_surface.SurfaceCapabilities) core1_0.Extent2D {
|
||
|
|
if capabilities.CurrentExtent.Width != -1 {
|
||
|
|
return capabilities.CurrentExtent
|
||
|
|
}
|
||
|
|
|
||
|
|
widthInt, heightInt := app.window.VulkanGetDrawableSize()
|
||
|
|
width := int(widthInt)
|
||
|
|
height := int(heightInt)
|
||
|
|
|
||
|
|
if width < capabilities.MinImageExtent.Width {
|
||
|
|
width = capabilities.MinImageExtent.Width
|
||
|
|
}
|
||
|
|
if width > capabilities.MaxImageExtent.Width {
|
||
|
|
width = capabilities.MaxImageExtent.Width
|
||
|
|
}
|
||
|
|
if height < capabilities.MinImageExtent.Height {
|
||
|
|
height = capabilities.MinImageExtent.Height
|
||
|
|
}
|
||
|
|
if height > capabilities.MaxImageExtent.Height {
|
||
|
|
height = capabilities.MaxImageExtent.Height
|
||
|
|
}
|
||
|
|
|
||
|
|
return core1_0.Extent2D{Width: width, Height: height}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (app *HelloTriangleApplication) querySwapChainSupport(device core1_0.PhysicalDevice) (SwapChainSupportDetails, error) {
|
||
|
|
var details SwapChainSupportDetails
|
||
|
|
var err error
|
||
|
|
|
||
|
|
details.Capabilities, _, err = app.surface.PhysicalDeviceSurfaceCapabilities(device)
|
||
|
|
if err != nil {
|
||
|
|
return details, err
|
||
|
|
}
|
||
|
|
|
||
|
|
details.Formats, _, err = app.surface.PhysicalDeviceSurfaceFormats(device)
|
||
|
|
if err != nil {
|
||
|
|
return details, err
|
||
|
|
}
|
||
|
|
|
||
|
|
details.PresentModes, _, err = app.surface.PhysicalDeviceSurfacePresentModes(device)
|
||
|
|
return details, err
|
||
|
|
}
|
||
|
|
|
||
|
|
func (app *HelloTriangleApplication) isDeviceSuitable(device core1_0.PhysicalDevice) bool {
|
||
|
|
indices, err := app.findQueueFamilies(device)
|
||
|
|
if err != nil {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
extensionsSupported := app.checkDeviceExtensionSupport(device)
|
||
|
|
|
||
|
|
var swapChainAdequate bool
|
||
|
|
if extensionsSupported {
|
||
|
|
swapChainSupport, err := app.querySwapChainSupport(device)
|
||
|
|
if err != nil {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
swapChainAdequate = len(swapChainSupport.Formats) > 0 && len(swapChainSupport.PresentModes) > 0
|
||
|
|
}
|
||
|
|
|
||
|
|
return indices.IsComplete() && extensionsSupported && swapChainAdequate
|
||
|
|
}
|
||
|
|
|
||
|
|
func (app *HelloTriangleApplication) checkDeviceExtensionSupport(device core1_0.PhysicalDevice) bool {
|
||
|
|
extensions, _, err := device.EnumerateDeviceExtensionProperties()
|
||
|
|
if err != nil {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, extension := range deviceExtensions {
|
||
|
|
_, hasExtension := extensions[extension]
|
||
|
|
if !hasExtension {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
func (app *HelloTriangleApplication) findQueueFamilies(device core1_0.PhysicalDevice) (QueueFamilyIndices, error) {
|
||
|
|
indices := QueueFamilyIndices{}
|
||
|
|
queueFamilies := device.QueueFamilyProperties()
|
||
|
|
|
||
|
|
for queueFamilyIdx, queueFamily := range queueFamilies {
|
||
|
|
if (queueFamily.QueueFlags & core1_0.QueueGraphics) != 0 {
|
||
|
|
indices.GraphicsFamily = new(int)
|
||
|
|
*indices.GraphicsFamily = queueFamilyIdx
|
||
|
|
}
|
||
|
|
|
||
|
|
supported, _, err := app.surface.PhysicalDeviceSurfaceSupport(device, queueFamilyIdx)
|
||
|
|
if err != nil {
|
||
|
|
return indices, err
|
||
|
|
}
|
||
|
|
|
||
|
|
if supported {
|
||
|
|
indices.PresentFamily = new(int)
|
||
|
|
*indices.PresentFamily = queueFamilyIdx
|
||
|
|
}
|
||
|
|
|
||
|
|
if indices.IsComplete() {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return indices, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (app *HelloTriangleApplication) logDebug(msgType ext_debug_utils.DebugUtilsMessageTypeFlags, severity ext_debug_utils.DebugUtilsMessageSeverityFlags, data *ext_debug_utils.DebugUtilsMessengerCallbackData) bool {
|
||
|
|
log.Printf("[%s %s] - %s", severity, msgType, data.Message)
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
app := &HelloTriangleApplication{}
|
||
|
|
|
||
|
|
err := app.Run()
|
||
|
|
if err != nil {
|
||
|
|
log.Fatalf("%+v\n", err)
|
||
|
|
}
|
||
|
|
}
|